The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 21, 2018
Filed:
Jan. 21, 2015
Applicant:
Texas Instruments Incorporated, Dallas, TX (US);
Inventors:
David Hernandez, Dallas, TX (US);
Mandy Barsilai, Richardson, TX (US);
Assignee:
Texas Instruments Incorporated, Dallas, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
G01R 27/02 (2006.01); G01R 31/28 (2006.01); G01R 31/34 (2006.01);
U.S. Cl.
CPC ...
G01R 27/02 (2013.01); G01R 31/2829 (2013.01); G01R 31/343 (2013.01);
Abstract
A method, apparatus and a system for a Linear Resonant Actuator (LRA) real time impedance tracking. The method includes extracting the Back Electro-Motive Force (BEMF) voltage from a driver's load current by determining a current multiplying factor utilizing a Least Mean Square (LMS) algorithm and introducing an error function to control the gain of the load current and isolate the BEMF.